Which county generated more solar power – the United States or China?

Grade level:  3rd- 5th grades

Skills: Circle graph

Related environmental issues: Energy

The circle graph below shows five countries that generated the largest amount of solar power, electricity generated from solar energy, in the world in 2017.

 

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  1. What country generated the largest amount of solar power in the world?
  2. What percentage did the United States make up?
  3. What country generated twice as much solar power as Italy?
  4. Did China make up more or less than the rest of the world combined?

Sources: REN 21, 2018

 

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Answer keys

  1. China
  2. 13%
  3. Germany
  4. more

How much energy & money do LED lamps save?

Grade level: 4th – 5th grades

Skills: Multiplication

Related environmental issues: Energy conservation

The table below shows how much electricity each light bulb uses to light your room in 1 year.

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  1. Your house has 30 light fixtures.  How much electricity do you use during a year if you use a regular light bulb for each light fixture?
  2. How much electricity do you use during a year if you use an energy saving light bulb for each house’s light fixture?
  3. How much electricity can you save if you replace all of the 30 regular light bulbs with energy saving light bulbs?
  4. The average price of 1kwh-electricity in California was 21 cents in August 2018. How much money could your family save for electricity in a year if you replaced all of the 30 light bulbs with energy saving light bulbs in a year?

 

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Answer keys

  1. 200 x 30 = 6,000 (kWh)
  2. 30 x 30 = 900 (kWh)
  3. 6,000 – 900 = 5,100 (kWh)
  4. 5,100 x 21 = 107,100 (cents) = $ 1,071